One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(10,13)(11,15)(17,18,22,25)(19,27,28,24)(20,29,30,31)(21,26,23,32)(1,3,6,2)(4,8,5,7)(9,10,12,13)(11,14,15,16)(17,19,22,28)(18,24,25,27)(20,26,30,32)(21,31,23,29)(10,13)(14,16)(17,20,23,24,22,30,21,27)(18,19,26,29,25,28,32,31)(1,4,6,5)(2,7,3,8)(9,11,12,15)(10,14,13,16)(18,25)(19,28)(26,32)(29,31)(1,5,6,4)(2,7,3,8)(17,21,22,23)(18,26,25,32)(19,29,28,31)(20,27,30,24)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.